Motion-picture camera.



comiected Ato a pin eo carried by 'the controlling Wheel 4:6 secured to the driving shaft l5. lhis 'wheel is also provided with spaced teeth or rejections 17 upon the periphery thereof' isposed to engage-the tail of the shutter mechanism and also the detent and 'thus control the 'feed oi the film and the accurate opening of the shutter intermittently timed by a single part, The driving shaft may be actuated by any desired means, for instance a crank 48.

in the operation of the linvention the rotation of the driving shaft is continuous and the spring connection between the controlling Wheel and the receiving spool is wound until a predetermined tension is secured 'when the slipping of the spring upon the disk hub revents an injurious tension und stores icient power to produce a number of rotations oi' the receiving spool. rhis 'feeding' of the film by the spring tension Acauses an instant and rapid intermittent movement thereof when the det-ent ot the holding roll is released by a tooth ot the controlling Wheel. The iilm is thus ied or pulled by the reeiying spool und no other driving` geuring therefor is required. The yielding connection between the driving shaft and receiving spool accommodates the increase in the diameter of the body of film upon the latter as the camera is operated, which would otherwise cause an increase in the speed ot travel of the film, and effects a uniform number of exposures per second and a proper positioning of the lilm therefor. This driving` of the receiving spool prevents undue tension upon the ilni and also any rebound thereof because there is at all times a constant even tension upon the spool.

It will be understood that the receiving spool as a part thereof the friction mb which is cmoreced by thc inner end of the driving sprinv', having a tight friction-al contact therewith producing; substantially a positive connection for driving until the tension placed upon the end orf said spring., at its connection with the controlling wheel secured upon the driving shaft, is suilicient to overcome this ifrictional contact and permit a release or slipping of the parts so that the receiving spool muy be at rest or have only a very limited movement. The detent p-.iwl only retains its wheel for a ve 'y short interval, equal to the distance between the contacts on the comrolling- Wheel, but during this interval the rotation of the driving shaft continues and tension is stored the spring; to operate the spool when the paul und film controlled thereby are next released.

The controlling Wheel by one oi' L teeth .first engages Lhe tail of the shutter member eliecting the opening of the shutter und utter the shutter is closed by its tension spring another tooth roclis the detent to lease the hn held by its roll and permits the receiving spool to iieed the film for the proper distance. The movement of this dctent across the curvedjace of the pawl rocks it bach into holding position to engage the next tooth of the detent Wheel. This construction produces un. accurate and absolute timing of the exposure and feed mechanisms. The pressure plate the lens tube retains the film in proper ilat position While permitting the feed thereof 'without strain. The iih'n spools are adapted to be removed from the camera in the usual manner when desired for development or other purpose. lt will also be understood that parts of this structure are equally applicable for use inl a rojecting apparatus for motion pictures.

Vhile a number oit the details ot' this mechanism have been specifically described 'the invention is not confined thereto as changes may be made therein without departing from the spirit of the invention as donned by the claires thereon.

ll'hat l claim is:

l. ln e. motion picture czunera, film feeding upd receiving` spools, a driving shaft upon which thel lattcris loosely mounted,

and a lilm escupemcnt controlled by u mcmp bei' upon said receiving' spool shaft to permit the film to be placed under a predetermined tension and subsequently released therefrom.-

2. In a motion picture camera, film feeding und receiving spools, a driving shaft upon `which the lutter is loosely mounted, a spring driving connection secured at one end to said shaft and releasably connected ut its opposite cnil to said receiving spool, and a film escupement controlled by a member upon the reccivin(T spool shaft.

ln a motion picture came 1, film feeding and receiving' spools, a driving shaft upon which the latter is loosely mounted, u spring;y connection secured to said shaft and having` u loose coiled connection frictionally engaging the receiving spool to permit release or rest of the latter when a predetermined spring tension thereon has been secured, and a film escupement controlled by n member upon the receiving spool shaft.

i. in u motion picture camera, vfilm feeding and receiving spools, a driving shaft upon which the latter is loosely mounted, u spring connected at one end to said shaft und having trictionul driving contact at itsopposite end with a portion carried by said receivingglspool, and a ilm escapement co1;- trolled by a member upon the receiving spool shaft. i in a motion picture camera, film feeding' and iccei\'i1ig spools, the lutter being provided with a drivingr hub, u driving shaft upon which the lutter is loosely mounted, a coiled spring connected at one end to smid shaft und liaving its opposite end friction- Lion pi und receiving; L

, tent fee n ing; and me 20 the latter, A

operating; @ha ambi? mouned upm said receiving spool bent feed bkreof mechanm.

9., "in a .motion g ing :m rmiv'n ing and mc for the #if upon le. Shu

mui "I" jctu'e Camera? fu n crank levers having a slot and arm connection for oint operation, an oii'set extension from one of said levers, a controlling wheel carried by said shaft and havingv a tooth disposed to engage said extension, and a restoring spring operating against said extension. l

2l. In a motion picture camera, a lilm escapement, film feeding and receiving spools, a driving disk secured to the latter and provided with a hub, a driving' shaft upon which saiddisk and receiving spool are rol tatably mounted, a coiled spring frictionally embracing said hub, and a ilm escapement controlling wheel secured to said shaft and to which the outer end of said 'spring is connected.

22. In a motion picture camera, iilm feeding and receiving spools, a driving shaft for the latter, a film holdingv Wheel provided with a detent, a pavvl cooperating,r with said detent, a controlling Wheel upon said shaft and adapted to actuate said pawl, and a spring connection between said controlling wheel and the receiving spool.

23. In a motion picture camera, film feed ing and receiving spools, a driving shait for the latter, a lm holding Wheel provided with a detent, a pawl cooperating with said detent, a controlling Wheel upon said shaft adapted to actuate said pavvl, a spring connecton between said controlling wheel and the receiving spoel, and a shutter mechanism having an operating,n extension disposed in the path of said controlling Wheel to be op erated thereby. 1

vupon which the latter is loosely 24. In a motion picture camera, film feeding and receiving spools, a driving shaft for the latter, film holding lmeans, a shutter mechanism, and a controllingr Wheel arranged to rotate said receiving spool and su/ccessively aetuate said shutter mechanism and holding means. p

Q5. In a motion picture camera, film feeding and receiving spools, a driving shaft upon which the latter is loosely mounted, means carried by the shaft ofithe receiving spool to apply a predetermined driving tension forming a substantially' positive connection between said shaft and receiving spool during the driving movement and ranged to permit said spool to remain at rest when saidtension is exceeded, and a film escapement controlled by a member upon the receivinzgr spool shaft.

26. In a motion picture camera, iilm feeding and receiving spools, a. drivingr shaft mounted, film escapement means controlled by a member upon the receiving spool shaft' and adapted to be intermittently released, anda yielding connection between said driving shaft and receivingfs/pool arranged to control said ineans and to permit continued rotation of said shaft when the film is held.

In testimony whereof I all'ix my signature in the presence of two witnesses.

, CHARLES SPIRO. Witnesses:

STEPHEN F. CURTIS, E, F. TIEDEMAN. 

